Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income		$ 55	$ 74	$ 119	$ 195
Other comprehensive income (loss):
Foreign currency translation adjustments	[1]	3	(10)	4	(29)
Reclassification adjustment on sale of business included in total other income (expense), net (Note 14)			1		1
Total other comprehensive income (loss)		3	(9)	4	(28)
Comprehensive income		$ 58	$ 65	$ 123	$ 167

[1] Foreign currency translation adjustments exclude income taxes due to our practice and intention to indefinitely reinvest the earnings of our foreign subsidiaries in those operations.